Answer
Failed and stalled jobs deserve top priority because they are frequently the first visible symptom of a deeper problem, whether that is a full auxiliary storage pool, a locked file, or a downstream system that stopped responding. Storage thresholds come next: an IBM i system that runs low on disk can degrade gracefully at first and then fail abruptly, so alerting well before critical thresholds gives operations time to act rather than react. Queue depth and subsystem stress often signal the same underlying issue from a different angle, and catching them early can prevent a slow degradation from becoming a full outage.
Security events belong in the first-alert tier even for organizations that have not historically treated monitoring and security as connected disciplines. Unusual profile activity, failed sign-on patterns, or changes to authorization lists and exit point programs can indicate either a genuine security event or a misconfigured application, and both deserve fast review. Buyers should ask whether the monitoring platform can correlate related conditions, such as a storage threshold breach coinciding with a batch job failure, since related alerts arriving separately often get triaged as unrelated noise instead of the single incident they actually represent.